Multi-power redundant power supply system and ship DC power distribution cabinet

Abstract

The embodiment of the utility model provides a multi-power-source redundant power supply system and a ship direct current power distribution cabinet. The multi-power-source redundant power supply system comprises a first power source input end and a second power source input end; a first load end and a second load end; the first-stage line and the second-stage line are sequentially connected to the plurality of load ends from the plurality of power input ends; the first switch unit is coupled between the first line section and the second line section and is configured to correspondingly disconnect / connect the first-stage line based on the availability / unavailability of the first power supply input end and correspondingly disconnect / connect the first-stage line based on the availability / unavailability of the second power supply input end; and the second switch unit is coupled between the third line section and the fourth line section, and is configured to correspondingly disconnect / connect the second-stage line based on the availability / unavailability of the first line section, and correspondingly disconnect / connect the second-stage line based on the availability / unavailability of the second line section. According to the invention, the hierarchical multi-section line structure is arranged, so that the multi-level redundancy of the power supply system is realized.

Description

Technical Field

[0001] The present disclosure relates to the technical field of ship power supply, and in particular to a multi-power redundant power supply system and a ship DC power distribution cabinet. Background Art

[0002] In the related art, DC power distribution cabinets, as key equipment for power distribution, are widely used in occasions that require highly reliable power supply. Although a variety of multi-power redundant power supply systems have been designed and applied to ensure the continuity and stability of power supply, these systems still expose some shortcomings in practical applications. First, the multi-power supply systems in the related art often lack flexible power management modes. Although such systems can provide multiple power backups, in actual operation, the switching mechanism between power supplies is relatively simple, and the power supply strategy cannot be intelligently adjusted according to power supply status, load demand or energy consumption efficiency. This leads to low utilization efficiency of some power supplies and insufficient optimization of resource allocation in some cases. Secondly, while achieving redundant power supply, most systems do not give enough consideration to the hierarchical management and fault isolation of lines. The power distribution cabinets in the related art usually adopt a relatively simple line layout. Once a line section fails, it may affect the entire power supply network, affecting the normal power supply in the non-fault area, reducing the overall reliability and fault recovery capability of the system. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a multi-power redundant power supply system and a ship DC distribution cabinet to solve the problems in the related technology.

[0004] A first aspect of the present disclosure provides a multi-power redundant power supply system, which is applied to a DC power distribution cabinet; comprising:

[0005] A plurality of power input terminals, including: at least one first power input terminal and at least one second power input terminal;

[0006] A plurality of load ends, including: at least one first load end and at least one second load end;

[0007] A first level circuit and a second level circuit connected sequentially from the plurality of power input terminals to a plurality of load terminals;

[0008] The first-level circuit includes a first circuit segment and a second circuit segment, the first circuit segment is coupled to the at least one first power input terminal; the second circuit segment is coupled to the at least one second power input terminal;

[0009] The second-level circuit includes a third circuit segment and a fourth circuit segment, the first power input terminal supplies power to at least one first load terminal via the first circuit segment and the third circuit segment; the second power input terminal supplies power to at least one second load terminal via the second circuit segment and the fourth circuit segment;

[0010] The first switch unit is coupled between the first line segment and the second line segment, and is configured to disconnect / conduct the first-level line correspondingly based on the availability / unavailability of the first power input terminal.

[0011] and disconnecting / conducting the first-level circuit accordingly based on the availability / unavailability of the second power input terminal;

[0012] The second switch unit is coupled between the third line segment and the fourth line segment, and is configured to disconnect / conduct the second-level line correspondingly based on whether the first line segment is available / unavailable.

[0013] And the availability / unavailability of the second line segment corresponds to disconnection / conduction of the second-level line.

[0014] Optionally, the first line segment or the second line segment is unavailable because:

[0015] The sub-switch unit in the first line section or the second line section is disconnected;

[0016] The first line section or the second line section is faulty.

[0017] Optionally, also include:

[0018] A first sub-switch unit, coupled in the first line segment;

[0019] A second sub-switch unit, coupled in the second line segment;

[0020] When the first sub-switch unit is turned on / off, the corresponding first line segment is available / unavailable;

[0021] When the second sub-switch unit is turned on / off, the corresponding second line segment is available / unavailable; and / or, further comprising:

[0022] A first rectifying unit, coupled between the first power input terminal and the second switch unit, and disposed on the first line segment;

[0023] The second rectifying unit is coupled between the second power input terminal and the second switch unit and is disposed on the second line segment.

[0024] Optionally, also include:

[0025] A third sub-switch unit is arranged on the third line segment, and when the third sub-switch unit is turned on / off, the corresponding third line segment is available / unavailable;

[0026] a fourth sub-switch unit, arranged on the fourth line segment, and when the fourth sub-switch unit is turned on / off, the corresponding fourth line segment is available / unavailable; and / or, further comprising:

[0027] A first transformer is arranged on the third line segment;

[0028] The second transformer is arranged on the fourth line segment.

[0029] Optionally, the third line segment or the fourth line segment is unavailable because:

[0030] The sub-switch unit in the third line segment or the fourth line segment is disconnected;

[0031] The third line segment or the fourth line segment is faulty.

[0032] Optionally, a third-level circuit disposed between the second-level circuit and the load end is further provided between the power input end and the load end, and the third-level circuit includes a fifth circuit segment and a sixth circuit segment;

[0033] A third switch unit is provided on the third-level line, coupled between the fifth line segment and the sixth line segment, and configured to disconnect / conduct the third-level line correspondingly based on whether the third line segment is available / unavailable.

[0034] And the availability / unavailability of the fourth line segment corresponds to disconnection / conduction of the third-level line.

[0035] Optionally, the at least one first load end is coupled to the fifth line segment, and the at least one second load end is coupled to the sixth line segment.

[0036] Optionally, it also includes a shore power input terminal coupled to the second-level circuit;

[0037] The second switch unit is further configured to switch on / off the second-level line correspondingly based on whether the shore power input terminal is available / unavailable.

[0038] Optionally, the first power input terminal is coupled to at least one of solar energy, a first fuel cell and a first lithium battery pack; and / or the second power input terminal is coupled to at least one of a second fuel cell and a second lithium battery pack.

[0039] A second aspect of the present disclosure provides a ship DC power distribution cabinet, which includes any one of the multi-power redundant power supply systems described above.

[0040] The beneficial effects of the present disclosure are as follows: by setting up a hierarchical multi-section line structure, multi-level redundancy of the power supply system is achieved. Even if a line or power supply at a certain level fails, the system can quickly and automatically switch to a backup line or power supply through a switch unit, ensuring continuous power supply to critical loads and significantly improving the stability and availability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A system structure block diagram of a multi-power redundant power supply system and a ship DC distribution cabinet in an embodiment of the present disclosure is shown.

[0042] Figure 2 A system structure block diagram of a multi-power redundant power supply system and a ship DC distribution cabinet in another embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0043] The following is an explanation of the embodiments of the present disclosure by specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the information disclosed by the present disclosure. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in the present disclosure can also be modified or changed in various ways according to different viewpoints and application modules without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0044] The following is a detailed description of the embodiments of the present disclosure with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure. The present disclosure can be embodied in many different forms and is not limited to the embodiments described herein.

[0045] In the representations of the present disclosure, the reference terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or a group of embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples represented in the present disclosure and the features of different embodiments or examples, unless they are mutually contradictory.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of the present disclosure, "a group" means two or more, unless otherwise clearly and specifically defined.

[0047] In order to clearly describe the present disclosure, components not related to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

[0048] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0049] Although the terms first, second, etc. are used to represent various elements in this article in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate that there are the described features, steps, operations, elements, modules, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or a group of other features, steps, operations, elements, modules, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0050] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present disclosure. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0051] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which the present disclosure belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with relevant technical literature and the message of the present disclosure, and shall not be overly interpreted as ideal or very formal meanings unless defined.

[0052] In the related art, most multi-power supply systems, while realizing redundant power supply, do not give enough consideration to the hierarchical management of lines and fault isolation. The DC distribution cabinets in the related art usually adopt a relatively simple line layout. Once a line segment fails, it may affect the entire power supply network, affecting the normal power supply of non-fault areas, and reducing the overall reliability and fault recovery capability of the system.

[0053] In one aspect of the present disclosure, a multi-power redundant power supply system is provided, which is applied to a DC power distribution cabinet. Figure 1 In an embodiment, the multi-power redundant power supply system comprises:

[0054] The plurality of power input terminals include at least one first power input terminal 101 and at least one second power input terminal 102 .

[0055] The plurality of load ends include: at least one first load end 201 and at least one second load end 202 .

[0056] The first-level circuit 301 and the second-level circuit 302 are connected from the plurality of power input terminals to the plurality of load terminals in sequence.

[0057] The first-level circuit 301 includes a first circuit segment and a second circuit segment, wherein the first circuit segment is coupled to the at least one first power input terminal 101 and the second circuit segment is coupled to the at least one second power input terminal 102 .

[0058] The second level circuit 302 includes a third circuit segment and a fourth circuit segment, and the first power input terminal 101 supplies power to at least one first load terminal 201 via the first circuit segment and the third circuit segment. The second power input terminal 102 supplies power to at least one second load terminal 202 via the second circuit segment and the fourth circuit segment.

[0059] The first switch unit 401 is coupled between the first line segment and the second line segment, and is configured to disconnect / conduct the first-stage line 301 based on the availability / unavailability of the first power input terminal 101.

[0060] And the first-level circuit 301 is disconnected / connected correspondingly based on the availability / unavailability of the second power input terminal 102.

[0061] The second switch unit 402 is coupled between the third line segment and the fourth line segment and is configured to disconnect / conduct the second-level line 302 based on the availability / unavailability of the first line segment.

[0062] And the availability / unavailability of the second line segment corresponds to disconnection / conduction of the second-level line 302.

[0063] Specifically, in Figure 1 As an example, at least one first power input terminal 101 and at least one second power input terminal 102 are provided, so that even if a single power supply fails, other power supplies can still supply power to the load end.

[0064] When the power supply and the line are normal, the first power input terminal 101 is coupled to the external power supply and supplies power to at least one first load terminal 201 via the first line segment and the third line segment. And the second power input terminal 102 is coupled to the external power supply and supplies power to at least one second load terminal 202 via the second line segment and the fourth line segment, thereby realizing separate power supply of the loads.

[0065] The first switch unit 401 is arranged on the first-level line 301. It can automatically disconnect or connect the first-level line 301 according to the availability of the first power input terminal 101 and the second power input terminal 102, ensuring that when the power connected to each first power input terminal 101 is unavailable or the power connected to each second power input terminal 102 is unavailable, for example, when a fault occurs, the load end can be powered by the power input terminal on the side without the fault.

[0066] The second switch unit 402 is arranged on the second-level line 302, and controls the on and off of the second-level line 302 according to the available status of the first line segment and the second line segment, further refines the fault and replaces it with redundancy, ensuring that even if a part of the first-level line 301 has a problem, the second-level line 302 can still maintain normal power supply, that is, when one of the line segments in the first-level line 301 fails, the second-level line 302 is turned on by turning on the second switch unit 402, so that the load end is powered by the power input end on the normal side of the line.

[0067] Further, the first switch unit 401 and the second switch unit 402 are in an off state when the circuit is normal, so that the first power input terminal 101 supplies power to the first load terminal 201 and the second power input terminal 102 supplies power to the second load terminal 202 in a normal state. As an example, the first switch unit 401 and the second switch unit 402 can be:

[0068] In the multi-power redundant power supply system, the first switch unit 401 and the second switch unit 402 can use the following specific devices to implement their functions:

[0069] It can be implemented by using a relay. Preferably, it can be implemented by using a solid-state relay or an electromagnetic relay. A signal is sent by an external control circuit to control the conduction and cutoff of the semiconductor inside the relay (such as a MOSFET or a thyristor), so as to realize the switching of the power supply line, without mechanical wear and with a fast response speed. For example, the control circuit continuously monitors the voltage state of the first power input terminal 101 and the second power input terminal 102. When it is detected that a certain power supply is unavailable, the control circuit immediately outputs a control signal to the relay, and the relay is turned on to the corresponding line after the response, so as to ensure the continuity and stability of the power supply.

[0070] A switch device can be used, and the conduction of the switch device can be controlled by an external control circuit to control the conduction of the first switch unit 401 and the second switch unit 402. The control circuit outputs a control signal according to the voltage change of the first power input terminal 101 and the second power input terminal 102 (which can be a comparison of the voltage difference and the threshold value, or a change in the voltage of the corresponding input terminal) to control the conduction of the switch device. The specific device selection of the first switch unit 401 and the second switch unit 402 can be changed according to actual conditions.

[0071] exist Figure 1 or Figure 2 In the embodiment, there may be multiple first power input terminals 101 , which are only connected in the figure. The same is true for the second power input terminal 102 , the first load terminal 201 , and the second load terminal 202 .

[0072] Optionally, the first line segment or the second line segment is unavailable because:

[0073] The sub-switch units in the first line section or the second line section are disconnected.

[0074] The first line section or the second line section is faulty.

[0075] Specifically, in some embodiments, the sub-switch unit may be an electromagnetic relay, a solid-state relay, or a switch element, etc., which is responsible for controlling the power on and off of the first line segment or the second line segment. When a sub-switch unit is disconnected due to internal mechanical failure, overload protection triggering, control signal failure, etc., the line segment corresponding to it can no longer transmit current, that is, the corresponding line segment is indicated as unavailable.

[0076] In addition to the problem of the sub-switch unit, the entire line segment itself may also fail due to various reasons, including but not limited to insulation damage caused by line aging, external physical damage (such as construction damage), burning caused by overvoltage or overcurrent, etc. These faults will affect the power transmission capacity of the entire line segment and may cause problems such as short circuit and open circuit. Therefore, the first line segment or the second line segment is detected by an external fault detection circuit, such as online monitoring of current and voltage parameters, so as to determine the line fault when the current and voltage parameters are abnormal. Once a line segment fault is detected, the corresponding line segment fault is output to turn on the second switch unit 402.

[0077] Optional, in Figure 2 In the embodiment, it also includes:

[0078] The first sub-switch unit 501 is coupled in the first line segment.

[0079] The second sub-switch unit 502 is coupled in the second line segment.

[0080] When the first sub-switch unit 501 is turned on / off, the corresponding first line segment is available / unavailable.

[0081] When the second sub-switch unit 502 is turned on / off, the corresponding second line segment is available / unavailable. And / or, further comprising:

[0082] The first rectifying unit 601 is coupled between the first power input terminal 101 and the second switch unit 402 , and is disposed on the first line segment.

[0083] The second rectifying unit 602 is coupled between the second power input terminal 102 and the second switch unit 402 , and is disposed on the second line segment.

[0084] Specifically, the first-level circuit 301 is provided with a first sub-switch unit 501 and a second sub-switch unit 502, which are installed in the first circuit segment and the second circuit segment, respectively. In some embodiments, the first sub-switch unit 501 and the second sub-switch unit 502 can be turned on or off by an external circuit or manually controlled to enable or disable the respective circuit segments. For example, when the first sub-switch unit 501 is turned on, it indicates that the first circuit segment is in an available state, and the current can be transmitted from the first power input terminal 101 to the load through the circuit segment. On the contrary, if the sub-switch unit is disconnected, the corresponding circuit segment is unavailable, thereby isolating the fault from the system or performing maintenance, and the corresponding circuit is turned on by turning on the corresponding switch unit, without affecting the normal power supply of the load end. In the normal circuit state, the first sub-switch unit 501 and the second sub-switch unit 502 are in a conducting state.

[0085] In some embodiments, Figure 1 In the embodiment, a first rectifier unit 601 and a second rectifier unit 602 may also be provided in the first-level circuit 301 to convert AC power into DC power to meet the power supply requirements of the load end. Figure 1 In the example, the first rectifier unit 601 is coupled between the first power input terminal 101 and the second switch unit 402, and the second rectifier unit 602 is coupled between the second power input terminal 102 and the second switch unit 402, and is located on the first line segment and the second line segment respectively. No matter which power input terminal provides AC power, it can ensure stable DC power to the load after passing through the rectifier unit.

[0086] Optional, in Figure 2 In the embodiment, it also includes:

[0087] The third sub-switch unit 503 is arranged on the third line segment. When the third sub-switch unit 503 is turned on / off, the corresponding third line segment is available / unavailable.

[0088] The fourth sub-switch unit 504 is arranged on the fourth line segment. When the fourth sub-switch unit 504 is turned on / off, the corresponding fourth line segment is available / unavailable. And / or, it also includes:

[0089] The first transformer 701 is arranged on the third line segment.

[0090] The second transformer 702 is arranged on the fourth line segment.

[0091] Specifically, in Figure 2 In the embodiment, the implementation of the third sub-switch unit 503 and the fourth sub-switch unit 504 can be the same as the implementation of the first sub-switch unit 501 and the second sub-switch unit 502. The third sub-switch unit 503 and the fourth sub-switch unit 504 are respectively installed on the third line segment and the fourth line segment, and are responsible for controlling the on-off state of their respective line segments. When the external detection circuit detects current anomalies, line faults or other situations that require disconnection, it outputs a corresponding control signal, and the corresponding sub-switch unit will be disconnected according to the control signal or manually disconnected to achieve fault isolation and protect the stable operation of the entire system. In the normal circuit state, the third sub-switch unit 503 and the fourth sub-switch unit 504 are in the on state.

[0092] exist Figure 2 In the embodiment of the present invention, the second-level circuit 302 further includes a first transformer 701 and a second transformer 702. Optionally, Figure 1In an embodiment, the first transformer 701 and the second transformer 702 are arranged on the second-level line 302; the first transformer 701 is arranged on the third line segment, and the second transformer 702 is arranged on the fourth line segment for voltage conversion. In a multi-power supply system, the output voltage of different power supply ends may not completely match the requirements of the load end, or the voltage level needs to be adjusted between different links to optimize the transmission efficiency or meet the load requirements. By changing the AC voltage, the transformer can adjust the voltage at the input end of the power supply to the voltage level that is most suitable for the load, and can also provide conversion between lines of different voltage levels, thereby increasing the compatibility and flexibility of the system for loads of different voltage levels.

[0093] Optionally, the third line segment or the fourth line segment is unavailable because:

[0094] The sub-switch units in the third line segment or the fourth line segment are disconnected.

[0095] The third line segment or the fourth line segment is faulty.

[0096] Specifically, the unavailable state of the third line segment or the fourth line segment is the same as that of the first line segment and the second line segment, and will not be described in detail here.

[0097] Optional, in Figure 2 In the embodiment, a third-level circuit 303 disposed between the second-level circuit 302 and the load end is further provided between the power input end and the load end, and the third-level circuit 303 includes a fifth circuit segment and a sixth circuit segment.

[0098] A third switch unit 403 is provided on the third-level line 303, coupled between the fifth line segment and the sixth line segment, and configured to disconnect / conduct the third-level line 303 based on the availability / unavailability of the third line segment.

[0099] The availability / unavailability of the fourth line segment corresponds to disconnection / conduction of the third-level line 303 .

[0100] Specifically, in some embodiments, in order to further enhance the flexibility and reliability of power distribution and fault isolation, Figure 1 On the basis of the two-level line architecture, a third-level line 303 is added. In the actual process, more levels of lines can be added according to actual needs, or multiple levels of lines are not added on the basis of the first-level line 301 and the second-level line 302. Figure 2 In the embodiment, the third-level line 303 is used to maintain power supply to the load end through the third-level line 303 when the first two-level lines fail.

[0101] The third switch unit 403 can control the conduction or disconnection of the third-level line 303. The third switch unit 403 monitors the status of the third-level line 303 in real time through a high-precision sensor and a microprocessor (which can be arranged in the third switch unit 403 or in the third switch unit 403). When it is monitored that any part of the third line segment or the fourth line segment is unavailable (for example, disconnected due to a fault or abnormal voltage), the third switch unit 403 can respond immediately and automatically disconnect or conduct the third-level line 303 to ensure the continuity and stability of power supply.

[0102] Optional, in Figure 2 In the embodiment, the at least one first load end 201 is coupled to the fifth line segment, and the at least one second load end 202 is coupled to the sixth line segment.

[0103] Specifically, in Figure 2 In the embodiment, the first load end 201 and the second load end 202 are coupled to the fifth line segment and the sixth line segment respectively. However, if the system is provided with more level lines based on the third level line 303, the first load end 201 and the second load end 202 can also be provided on the last level line.

[0104] Optional, in Figure 2 In the embodiment, a shore power input terminal 103 is further included, which is coupled to the second-level line 302 .

[0105] The second switch unit 402 is further configured to switch on / off the second-level line 302 correspondingly based on whether the shore power input terminal 103 is available / unavailable.

[0106] Specifically, in some embodiments, by adding a shore power input terminal 103 coupled to the second-level line 302, full use is made of the shore-based power resources that can be accessed when the ship is docked, and the consumption of the ship's own energy (such as diesel generators or batteries) is reduced, thereby improving energy utilization efficiency and reducing environmental pollution.

[0107] When the ship is docked and connected to shore power, the second switch unit 402 is turned on according to the availability of shore power. Thus, the second switch unit 402 will turn on the second-level line 302, so that the shore power can directly provide power to the load, while disconnecting or reducing the dependence on other power sources on the ship (such as fuel cells, generators, etc.). At the same time, when the first line segment and the second line segment are available, when the shore power input terminal 103 is connected to the shore power, the corresponding power supply device can be charged through the first power input terminal 101 and the second power input terminal 102 to ensure sufficient power supply.

[0108] Alternatively, when shore power is unavailable or the vessel leaves the port, the second switch unit 402 is disconnected to switch back to the original power supply mode to ensure the continuity and stability of power supply.

[0109] Optionally, the at least one first power input terminal 101 is coupled to at least one of solar energy, a first fuel cell, and a first lithium battery pack. And / or, the at least one second power input terminal 102 is coupled to at least one of a second fuel cell and a second lithium battery pack.

[0110] Specifically, the first power input terminal 101 can be coupled with a high-efficiency solar photovoltaic panel array, which directly converts solar energy into DC power through advanced photovoltaic conversion technology and supplies it to the system. The photovoltaic panel array optimizes the layout according to the lighting conditions of the installation site to ensure maximum energy capture. The first power input terminal 101 and the second power input terminal 102 can also be coupled with a first fuel cell or a second fuel cell, using hydrogen or methanol as fuel to produce clean electricity and water through electrochemical reactions. In order to store excess electricity generated by solar energy and fuel cells, the system is configured with a first lithium battery pack or a second lithium battery pack. And the first lithium battery pack or the second lithium battery pack can also supply power to the load end, and when the shore power is connected, the shore power can also charge the first lithium battery pack or the second lithium battery pack.

[0111] In some embodiments, when the solar power is large enough, the load end is powered by the solar energy and the lithium battery is charged. When the solar power is not enough to power all the load ends, the lithium battery pack is discharged and the fuel cell starts to work.

[0112] In another aspect of the present disclosure, there is provided a ship DC power distribution cabinet, which includes any one of the above-mentioned multi-power redundant power supply systems.

[0113] The above embodiments are merely illustrative of the principles and effects of the present disclosure, and are not intended to limit the present disclosure. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present disclosure shall still be covered by the protection scope of the present disclosure.

Claims

1. A multi-power redundant power supply system, characterized in that: Applicable to DC distribution cabinet; including: A plurality of power input terminals, including: at least one first power input terminal and at least one second power input terminal; A plurality of load ends, including: at least one first load end and at least one second load end; A first level circuit and a second level circuit connected sequentially from the plurality of power input terminals to a plurality of load terminals; The first-level circuit includes a first circuit segment and a second circuit segment, the first circuit segment is coupled to the at least one first power input terminal; the second circuit segment is coupled to the at least one second power input terminal; The second-level circuit includes a third circuit segment and a fourth circuit segment, the first power input terminal supplies power to at least one first load terminal via the first circuit segment and the third circuit segment; the second power input terminal supplies power to at least one second load terminal via the second circuit segment and the fourth circuit segment; The first switch unit is coupled between the first line segment and the second line segment, and is configured to disconnect / conduct the first-level line based on the availability / unavailability of the first power input terminal. and disconnecting / conducting the first-level circuit accordingly based on the availability / unavailability of the second power input terminal; The second switch unit is coupled between the third line segment and the fourth line segment, and is configured to disconnect / conduct the second-level line correspondingly based on whether the first line segment is available / unavailable. And the availability / unavailability of the second line segment corresponds to disconnection / conduction of the second-level line.

2. The multi-power redundant power supply system according to claim 1, characterized in that: The first line segment or the second line segment is unavailable for one of the following: The sub-switch unit in the first line section or the second line section is disconnected; The first line section or the second line section is faulty.

3. The multi-power redundant power supply system according to claim 1, characterized in that: Also includes: A first sub-switch unit, coupled in the first line segment; A second sub-switch unit, coupled in the second line segment; When the first sub-switch unit is turned on / off, the corresponding first line segment is available / unavailable; When the second sub-switch unit is turned on / off, the corresponding second line segment is available / unavailable; and / or, also include: A first rectifying unit, coupled between the first power input terminal and the second switch unit, and disposed on the first line segment; The second rectifying unit is coupled between the second power input terminal and the second switch unit, and is disposed on the second line segment.

4. The multi-power redundant power supply system according to claim 1, characterized in that: Also includes: A third sub-switch unit is arranged on the third line segment, and when the third sub-switch unit is turned on / off, the corresponding third line segment is available / unavailable; a fourth sub-switch unit, arranged on the fourth line segment, and when the fourth sub-switch unit is turned on / off, the corresponding fourth line segment is available / unavailable; and / or, also include: A first transformer is arranged on the third line segment; The second transformer is arranged on the fourth line segment.

5. The multi-power redundant power supply system according to claim 1, characterized in that: The third line segment or the fourth line segment is unavailable for one of the following reasons: The sub-switch unit in the third line segment or the fourth line segment is disconnected; The third line segment or the fourth line segment is faulty.

6. The multi-power redundant power supply system according to claim 1, characterized in that: A third-level circuit is also included between the power input terminal and the load terminal and is arranged between the second-level circuit and the load terminal, and the third-level circuit includes a fifth circuit segment and a sixth circuit segment; A third switch unit is provided on the third-level line, coupled between the fifth line segment and the sixth line segment, and configured to disconnect / conduct the third-level line correspondingly based on whether the third line segment is available / unavailable. And the availability / unavailability of the fourth line segment corresponds to disconnection / conduction of the third-level line.

7. The multi-power redundant power supply system according to claim 6, characterized in that: The at least one first load end is coupled to the fifth line segment, and the at least one second load end is coupled to the sixth line segment.

8. The multi-power redundant power supply system according to claim 1, characterized in that: Also includes a shore power input terminal coupled to the second-level circuit; The second switch unit is further configured to switch on / off the second-level line correspondingly based on whether the shore power input terminal is available / unavailable.

9. The multi-power redundant power supply system according to claim 1, characterized in that: The first power input terminal is coupled to at least one of solar energy, a first fuel cell and a first lithium battery pack; and / or the second power input terminal is coupled to at least one of a second fuel cell and a second lithium battery pack.

10. A ship DC power distribution cabinet, characterized in that: It comprises a multi-power redundant power supply system as described in any one of claims 1 to 9.

Images